RUKO HGB-DIN352-HSS-60°-Nr.3 Metric Coarse Thread Finishing Tap M3

Machinists and metalworkers use the RUKO HGB-DIN352-HSS-60°-Nr.3 finishing tap when threading blind or through holes in unalloyed and low-alloyed steels, cast iron, and non-ferrous metals. This tap cuts a metric coarse thread with a nominal diameter of M3 and a pitch of 0.5 mm, conforming to DIN 352 and tolerance class ISO 2 (6H).

Key specifications

• Thread type: Metric coarse thread
• Nominal thread diameter: M3
• Thread pitch: 0.5 mm
• Standard: DIN 352
• Material: High-speed steel (HSS)
• Tap type: Finishing tap (Nr. 3)
• Thread angle: 60°
• Cutting direction: Right-hand
• Tolerance class: ISO 2 (6H)
• Total length: 40 mm
• Thread length: 11 mm
• Shank diameter: 3.5 mm
• Square drive size: 2.7 mm
• Number of flutes: 3
• Surface finish: Bright
• Recommended material application: Unalloyed and low-alloyed steels, cast iron, non-ferrous metals
• Tool holder compatibility: Tap wrenches with square drive
• Packaging quantity: 1 piece

Why choose it

The HSS construction provides durability and heat resistance for threading operations. The finishing tap (Nr. 3) produces final, precise threads to ISO 2 (6H) tolerance, ensuring a proper fit for M3 fasteners. Its right-hand cutting direction suits standard clockwise threading.

Ideal use cases

• Creating M3 metric coarse threads in steel components
• Threading cast iron parts in maintenance and repair
• Producing threads in non-ferrous metals such as aluminum or brass
• Finishing pre-drilled holes to final thread dimensions

Good to know

Use with a tap wrench that fits the 2.7 mm square drive. For best results, employ appropriate cutting fluid and follow recommended tapping speeds for HSS taps. The bright surface finish reduces friction and aids chip evacuation.